PROPERTY AND EQUIPMENT, NET - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 259	$ 291	$ 294
Noncash investing activity related to additions to property and equipment, including stock-based compensation and accrued liabilities, amount	51	4	15
Capitalized software
Property, Plant and Equipment [Line Items]
Additions to property and equipment	$ 191	$ 144	$ 109